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Old 03-16-2016, 11:10 AM   #51
PrinceVegeta
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Member#: 428946
Join Date: Aug 2015
Vehicle:
2008 JDM WRX

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Hey all,

I have to bump this thread..

I have the symptoms of a blown head gasket, E.G. Bubbles in over flow tank

But the bubbles only occur after boosting hard for a couple of times.

I have tried flushing my coolant, changing to new radiator caps, 1.1 bar cap (with wings) top tank, 1.3 bar cap (round cap) on radiator itself, removing thermostat, but to no avail..

The thing is, this only happens after boosting hard. I was NOT overheating at all.

The coolant seems to be pushed from the TOP tank to the overflow tank, after the overflow tank overflows, I open up the TOP tank and its significantly low in coolant or empty.

My motor is a bone stock JDM EJ20 motor running a Twin Scroll VF turbo at 23psi

I also bought the UVIEW combustion test kit and have tested extensively, when idling when revving, but the test comes up negative..

I should also mention that this came about coincidentally after my recent build which included,

Turbo change (VF53 ball bearing)
Downpipe change
Timing belt / water pump change
IAG TGV deletes
Top feed rails with FIC injectors
intercooler change

Could any of these have affected and cause this problem?? Maybe its the turbo?? Could the water lines have been jammed up and cause lots of pressure in the TOP coolant tank, causing it to overflow to the overflow tank??

I have run out of ideas!!! Why wouldnt the test liquid just change to green??
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Last edited by PrinceVegeta; 03-16-2016 at 11:27 AM.
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Old 03-16-2016, 11:33 AM   #52
DutchOven
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Member#: 220629
Join Date: Aug 2009
Chapter/Region: SCIC
Vehicle:
2010 White WRX Hatch
2015 White WRX Limited

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What color is the coolant that is coming out? Also, what head studs did you build your motor with?
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Old 03-16-2016, 11:44 AM   #53
PrinceVegeta
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Member#: 428946
Join Date: Aug 2015
Vehicle:
2008 JDM WRX

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Hey man,

Thanks for your reply

The colour that is coming out is the same colour that was poured in..

There looks to be NO engine oil mixed in the coolant overflow tank that is bubbling

My motor is Bone Stock it is using the stock OEM Head Studs..
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